Enteric illness risks before and after water treatment improvements

Autor: Twila R. Kunde, Melissa H. Roberts, Kristine Tollestrup, Lucy Harter, Floyd J. Frost, Gunther F. Craun
Rok vydání: 2009
Předmět:
Giardiasis
Male
Halogenation
Gastrointestinal Diseases
Cryptosporidiosis
Water supply
Risk Factors
Poisson Distribution
Prospective Studies
Sanitation
Child
Waste Management and Disposal
Water Science and Technology
biology
Cryptosporidium
Middle Aged
Diarrhea
Infectious Diseases
Child
Preschool
Regression Analysis
Female
Water treatment
Age distribution
medicine.symptom
Water Microbiology
Adult
Microbiology (medical)
Northwestern United States
Adolescent
Portable water purification
Water Purification
Young Adult
Age Distribution
Oxidants
Photochemical
Ozone
Enterobacteriaceae
Water Supply
Environmental health
medicine
Humans
Aged
business.industry
Giardia
Immunity
Public Health
Environmental and Occupational Health
biology.organism_classification
Increased risk
Water resource management
business
Surface water
Zdroj: Journal of Water and Health. 7:581-589
ISSN: 1996-7829
1477-8920
DOI: 10.2166/wh.2009.116
Popis: This study evaluated whether occurrence of acute gastrointestinal illnesses declined after filtration and ozonation were added to a previously unfiltered, chlorinated high-quality surface water source in a northwest United States city. Enteric and other illnesses were recorded for two 6-month periods for control and intervention sites in the same city. During phase 1, chlorinated, unfiltered drinking water for both sites was obtained from protected watersheds. During phase 2, the intervention site received chlorinated, filtered and ozonated drinking water. The water was not altered in the control site. No overall differences were found in the risk of any of the illnesses after the new water treatment plant was completed. There was a significantly increased risk of diarrhoea and highly credible gastrointestinal illness in participants with three or more episodes of the same type of illness during phase 1.
Databáze: OpenAIRE
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